Types and Classes of RTD

2-wire configuration: This type of configuration has the least accuracy. There is no wire provided for compensation. Hence, in this configuration, error is more.An alternate method to compensate lead wire resistance is by connecting a 2 or 3-wire RTD to a transmitter. A transmitter converts RTD resistance into a low current signal and then transmits it…

Working Principle of Temperature Sensor and Its Application

Thermocouples, Resistance Temperature Detectors (RTDs), Thermistors, Infrared, and Semiconductor Sensors. What is a Temperature Sensor? Usually, a temperature sensor is a thermocouple or a resistance temperature detector (RTD) that gathers the temperature from a specific source and alters the collected information into an understandable type for an apparatus or an observer. Temperature sensors are used…

How RTD works

How RTD works A resistance temperature detector(RTD) is a temperature measuring device made of materials such as platinum whose resistance change is known at different temperatures. The R v/s T curve is used to determine the temperature. The platinum RTD’s are the most stable, linear and accurate among all the RTD’s The Common material used…

Easy Thermocouple Hookup

Thermocouples

The Seebeck effect is fairly linear; that is, the voltage produced by a heated junction of two wires is directly proportional to the temperature. This means that the temperature of the metal wire junction can be determined by measuring the voltage produced. Thus, the Seebeck effect provides for us an electric method of temperature measurement.…

Thermocouple construction, color codes

Thermocouples (TCs)

Thermocouples are among the easiest temperature sensors to use and obtain and are widely used in science and industry. They are based on the Seebeck effect that occurs in electrical conductors that experience a temperature gradient along their length. They are “simple”, rugged, need no batteries, measure over very wide temperature ranges and more. They…

SENSORS

How Thermocouple works A thermocouple is a temperature measuring device which is formed when two dissimilar metals are joined together. When both the ends are joined together continuous current flows through the wires when one end is heated. This is called thermoelectric effect or see back effect. When there is difference in temperature at both…